I'm installing dual Lifeline LL-1257TB batteries in my junk.
I'd like to do this:
*Use one battery for the stand alone engine/ECU wiring.
*Use the other battery for all the chassis wiring.
*Use both for starting engine.
*Charge both off the one alt, with priority given to engine battery first, then the chassis battery.
This (below) seems to fit the bill. I'm not and electrical guy though. Can I get a sanity check on this? Is there something better or more appropriate out there I should be looking at?
According to the site:
EATON's Sure Power 1315-200 Battery Separator
Category: Battery Separators
Designed for use in multi-battery applications as a solenoid priority system
Allows multiple batteries to be charged from one charging source
Prioritized charging, charges primary battery and then remaining batteries
Bi-directional: charge two batteries from two sources
Isolates batteries when fully charged
Protection circuitry absorbs coil generated voltage spikes
Prevents charging system overload
Start assist feature parallels batteries for added power during start
Universally suited for mounting on tow vehicles
5/16" x 24 studs
-40°F (-40°C) to 185°F (85°C)
SAE J1455, SAE J1113
12 volts, 200A
I've seen many dual battery setups that seem to have all kinds of gizmos attached. Plus most are stupid expensive.
This appears to be a rather simple solution, unless I've completely missed the mark.
My Jeep has had all the factory wiring removed. Chassis wiring is a Painless kit. Engine wiring is a stand alone PSI harness for the LS. Alt on the LS is a 220amp Powermaster.